2 * Copyright (c) 2019 Justin Hibbits
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
29 #include <sys/param.h>
30 #include <sys/types.h>
31 #include <sys/eventhandler.h>
32 #include <sys/kernel.h>
33 #include <sys/systm.h>
34 #include <sys/endian.h>
39 #include <machine/spr.h>
40 #include <machine/trap.h>
43 struct opal_hmi_event {
55 uint32_t xstop_reason;
64 #define HMI_DISP_RECOVERED 0
65 #define HMI_DISP_NOT_RECOVERED 1
68 opal_hmi_event_handler(void *unused, struct opal_msg *msg)
70 struct opal_hmi_event evt;
72 memcpy(&evt, &msg->params, sizeof(evt));
73 printf("Hypervisor Maintenance Event received"
74 "(Severity %d, type %d, HMER: %016lx).\n",
75 evt.severity, evt.type, evt.hmer);
77 if (evt.disposition == HMI_DISP_NOT_RECOVERED)
78 panic("Unrecoverable hypervisor maintenance exception on CPU %d",
85 opal_hmi_handler2(struct trapframe *frame)
88 * Use DMAP preallocated pcpu memory to handle
89 * the phys flags pointer.
91 uint64_t *flags = PCPU_PTR(aim.opal_hmi_flags);
95 err = opal_call(OPAL_HANDLE_HMI2, DMAP_TO_PHYS((vm_offset_t)flags));
97 if (be64toh(*flags) & OPAL_HMI_FLAGS_TOD_TB_FAIL)
98 panic("TOD/TB recovery failure");
100 if (err == OPAL_SUCCESS)
103 printf("HMI handler failed! OPAL error code: %d\n", err);
109 opal_hmi_handler(struct trapframe *frame)
113 err = opal_call(OPAL_HANDLE_HMI);
115 if (err == OPAL_SUCCESS)
118 printf("HMI handler failed! OPAL error code: %d\n", err);
124 opal_setup_hmi(void *data)
126 /* This only works for OPAL, so first make sure we have it. */
127 if (opal_check() != 0)
130 if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI2) == OPAL_TOKEN_PRESENT)
131 hmi_handler = opal_hmi_handler2;
132 else if (opal_call(OPAL_CHECK_TOKEN, OPAL_HANDLE_HMI) == OPAL_TOKEN_PRESENT)
133 hmi_handler = opal_hmi_handler;
135 printf("Warning: No OPAL HMI handler found.\n");
139 EVENTHANDLER_REGISTER(OPAL_HMI_EVT, opal_hmi_event_handler, NULL,
140 EVENTHANDLER_PRI_ANY);
143 printf("Installed OPAL HMI handler.\n");
146 SYSINIT(opal_setup_hmi, SI_SUB_CPU, SI_ORDER_ANY, opal_setup_hmi, NULL);